JP4777527B2 - Drinking straw and method for producing the same - Google Patents
Drinking straw and method for producing the same Download PDFInfo
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- JP4777527B2 JP4777527B2 JP2001065198A JP2001065198A JP4777527B2 JP 4777527 B2 JP4777527 B2 JP 4777527B2 JP 2001065198 A JP2001065198 A JP 2001065198A JP 2001065198 A JP2001065198 A JP 2001065198A JP 4777527 B2 JP4777527 B2 JP 4777527B2
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Description
【0001】
【発明の属する技術分野】
この発明は、飲料を吸飲するために用いられる吸口付きのストロー及びその製造方法に関する。
【0002】
【従来の技術】
従来、ストローとしては、細長い直管を所定長さに切断したものや、その中間部に自由に伸縮する蛇腹機構が設けられて湾曲可能となされたもの等が一般的に多く用いられている。
【0003】
ところで、上記構成に係る従来のストローを用いて、例えば乳幼児が飲料を飲もうとした場合、乳幼児は口周りの筋肉が十分に発達していないため、細い直管状のストローを安定してくわえることができず、そのために一旦くわえたとしても容易に口から抜け出すことが多く、また飲んでいる途中で口からストローが抜け出すと飲料を口からこぼしてしまうといったようなことがあった。
【0004】
また、ストローの端部において切断面がむき出しになっているので、ストローの取り扱いに慣れない乳幼児が誤ってそのストローの端部で口の中を突いてしまうこともある。特にストローを口にくわえながら歩いたり、走ったりしている際に転倒等した場合には怪我をする危険性もある。
【0005】
そこで、先行提案においては、ストロー本体の上端部に該本体の外径よりも径大の丸みを帯びた吸口部材を接着、融着、或いは強制嵌合等により一体的に設けたものとすることが提案されている。
【0006】
この先行提案によるものは、ストロー本体上端部に該本体の外径よりも径大の吸口部材が形成されているので、該吸口部材を口の中で係止させた状態でストローをくわえることにより口から抜け出しにくい、即ち離脱し難いものとなると共に、吸口部材が丸みを帯びて形成されているので、ストローの上端で口の中を突いたりする事態を防止することができ、安全性を確保することができるものである点で有利である。
【0007】
【発明が解決しようとする課題】
しかしながら、上記構成に係るストローでは、吸口部材がストロー本体から離脱することが懸念される。即ち、乳幼児等がストロー一端の吸口部材をくわえ込んで、ストロー本体の上端部、特に吸口部材の下端側近傍部分を噛み潰して、該部の断面形状を塑性変形させてしまうことがあり、これが原因となって吸口部材の接合面に剥離や係止構造の解除をもたらすことがあり、これにより吸口部材がストロー本体から不本意に離脱してしまうおそれがあった。しかも、吸口部材がストローから離脱した場合には、その大きさからして乳幼児等が誤って飲み込んでしまう危険も懸念されるところであった。
【0008】
また、ストロー本体と吸口部材を別個に製作してから両者を嵌合一体化するものである場合には、各部材の製作工程、これらの嵌合一体化工程を要し、工程数が多く生産性に劣るという問題もあった。
【0009】
この発明は、かかる技術的背景に鑑みてなされたものであって、乳幼児等が使用する場合であっても飲料を吸飲しやすく、かつストロー上端に設けられた吸口部材がストローから離脱することがなく、万一離脱した場合でも吸口部材を飲み込むことがなくて安全性を十分に確保することができると共に、生産性に優れた吸飲用ストロー及びその製造方法を提供することを目的とする。
【0010】
【課題を解決するための手段】
上記目的を達成するために、この発明に係る吸飲用ストローは、管状体からなるストロー本体の上端部に、膨隆状頭部を形成する吸口部材が一体的に被覆装着されると共に、該吸口部材の下端から下方に垂下されて前記ストロー本体の上端部所定長さ範囲を密着状態に被覆補強する筒状補強部材が一体的に設けられてなることを特徴とするものである。
【0011】
これによれば、ストロー本体の上端部に、膨隆状頭部を形成する吸口部材が一体的に被覆装着されるので、乳幼児等が口にくわえる場合であっても吸口部材を口中、例えば上下の歯や唇に係止させながらストローをくわえることができ、口から容易にストローが離脱することがなくて飲みやすいストローとなし得る。また、該吸口部材の下端から下方に垂下されて前記ストロー本体の上端部所定長さ範囲を被覆補強する筒状補強部材が一体的に設けられてなるので、ストロー本体の上端部、特に吸口部材下端側近傍部分が補強され、噛み潰され難いものとなり、これにより乳幼児等がストロー本体の吸口部材下端側近傍部分を噛んだ場合でも、吸口部材が離脱し難いものとなる。しかも、万一吸口部材がストロー本体から離脱した場合でも、吸口部材は筒状補強部材と共に離脱されることとなり、筒状補強部材はストロー本体の上端部所定長さ範囲を被覆する比較的大きなものとなされているので、乳幼児が誤って飲み込む心配もなく、安全性を十分に確保することができる。
【0012】
ストロー本体の上端部外周面に前記筒状補強部材が被覆装着され、該被覆装着された補強部材の上端部外周面を密着状態に覆った態様で吸口部材が一体成形されてなる場合には、吸口部材と筒状補強部材との材質、色等を異にすることができ、例えば両部材にそれぞれ異なる色を付することにより独特の意匠性に優れたストローを提供することができる。
【0013】
前記筒状補強部材及びストロー本体の上端部周壁に1ないし複数の係合孔がそれらの周壁を貫通して設けられると共に、前記吸口部材の内周面から1ないし複数の係合突起が内方に突出形成され、該係合突起が前記係合孔に係合されてなる場合には、吸口部材、筒状補強部材及びストロー本体とが強固に一体化されるので、各部材の離脱がより一層確実に防止され、乳幼児等が誤飲する危険性を一層確実に回避することができる。
【0014】
前記筒状補強部材は、その下端が下方に向かって内側に傾斜するテーパー状の挿入ガイドに形成するのが、好ましい。このような構成とすれば、相対的に径小であるようなストロー差込口、例えば蓋付きコップのストロー差込口等にスムーズに強制挿入することができる一方、該差込口に強制挿入されたストローは簡単に抜けることがなく、一層飲みやすいストローとなし得る。
【0015】
一方、この発明に係る吸飲用ストローの好適な製造方法は、ストロー本体の中空空間内に、ストロー本体の上端を貫通して、一部が外方に突出する態様でピンを挿通配置せしめる工程と、前記ストロー本体の上端部外周面に、該上端部所定長さ範囲を密着状態に被覆補強する筒状補強部材をインサート成形により一体成形する工程と、該筒状補強部材及びストロー本体の上端部周壁に1ないし複数の係合孔をそれらの周壁を貫通して設ける工程と、該補強部材の上端部外周面及び前記ピンの上方突出部外周面を被覆する態様で、インサート成形により膨隆状頭部を形成する吸口部材を一体成形する工程と、該工程後にピンを抜脱する工程と、を包含することを特徴とするものである。
【0016】
これによれば、前記ストロー本体の上端部外周面に、該上端部所定長さ範囲を密着状態に被覆補強する筒状補強部材を一体成形するので、筒状補強部材の製作と該部材のストロー本体への装着を同時にすることができ、吸飲用ストローの生産性を向上させることができる。また、該筒状補強部材及びストロー本体の上端部周壁に1ないし複数の係合孔をそれらの周壁を貫通して設けたのち、該補強部材の上端部外周面及び前記ピンの上方突出部外周面を被覆する態様で、インサート成形により膨隆状頭部を形成する吸口部材を一体成形するので、上述同様、吸口部材の製作と装着を同時にすることができ、生産性の向上が図られると共に、筒状補強部材の周壁だけでなく、ストロー本体の周壁にも樹脂が入り込んで突起が形成され、簡単に各部材の強固な一体化が図られる。しかも、吸口部材は、ストロー本体の中空空間内に、該本体の上端部を貫通して一部が外方に突出する態様でピンを挿通配置せしめた状態でインサート成形するので、一体成形後にピンを除去すると軸線方向に貫通する中空空間が形成され、これがストロー本体の中空空間と連通状態となるから、格別の穿孔工程を要することなく、ストローの全長に亘り、しかも吸口部材内の口径を任意に設定した吸口孔を簡単に形成することができる。
【0017】
【発明の実施の形態】
以下、この発明に係る吸飲用ストローを図面に示す一実施形態に基づいて説明する。
【0018】
この吸飲用ストロー(1)は、図1ないし図3に示すように、両端に開口を有する合成樹脂製の細長い管状体からなるストロー本体(2)の上端部に、同じく合成樹脂からなる膨隆状頭部を形成する正面視ハート型形状の有色の吸口部材(3)が一体的に被覆装着されていると共に、該吸口部材(3)の下端から垂下されて前記ストロー本体(2)の上端部所定長さ範囲を密着状態に被覆補強する筒状補強部材(4)が一体的に設けられたものである。即ち、この吸飲用ストロー(1)は、特に図2及び図3に示すように、ストロー本体(2)の上端部外周面にインサート成形により前記筒状補強部材(4)が密着状態に被覆装着され、該被覆装着された補強部材(4)の上端部外周面を覆った態様でインサート成形により吸口部材(3)が一体成形されてなるものである。なお、本実施形態においては、ストロー本体(2)は、押し出し成形により連続的に形成された合成樹脂製の断面視円形の管状体を所定長さに裁断したものが用いられている。
【0019】
このように筒状補強部材(4)によりストロー本体(2)の吸口部材(3)下端側近傍部分が被覆補強されているので、吸口部材(3)下端側のストロー本体(2)周壁が補強され、噛み潰され難いものとなり、これにより乳幼児等がストロー(1)を噛んだりした場合でも、吸口部材(3)が離脱し難いものとなる。しかも、万一吸口部材(3)がストロー本体(2)から離脱した場合でも、一体化されている筒状補強部材(4)と共に離脱することとなり、該筒状補強部材(4)はストロー本体(2)の上端部所定長さ範囲を被覆するような比較的大きなものとなされているので、乳幼児が誤って飲み込む心配もなく、安全性を十分に確保することができる。この筒状補強部材(4)は、その長さがストロー本体(2)上端縁から25mm〜60mmの範囲に設定されている。筒状補強部材(4)の長さが25mmよりも小さいときは、万一該補強部材(4)に一体化された吸口部材(3)がストロー本体(2)から離脱した場合に乳幼児等が誤飲するおそれがあることから好ましくなく、一方60mmよりも大きいときは、製造コストがかさむばかりでなく、デザイン性も低下するので好ましくない。更に好ましくは、筒状補強部材(4)の長さを35mm〜50mmの範囲に設定するのが良い。
【0020】
また、筒状補強部材(4)は、その下端が下方に向かって内側に傾斜するテーパー状の挿入ガイド部(4a)として形成される。これにより、ストロー差込口、例えば蓋付きコップの相対的に口径の小さいストロー差込口等にスムーズに強制挿入することができる一方、該差込口に強制挿入されたストロー(1)は簡単に抜けることがないものとすることができる。
【0021】
更に、筒状補強部材(4)は、特に図3(イ)、(ロ)に示すように、その上端部外周面に環状離脱防止用突出部(6)がストロー(1)の軸線方向において断面ジグザグ状に形成される一方、吸口部材(3)の内周面にはこれらの突出部(6)に対向して環状係合溝(7)が形成され、これらが係合されている。また、該突出部(6)の下方に位置する筒状補強部材(4)及びストロー本体(2)の上端部周壁に相互に対向して2つの係合孔(8)(8)(8)(8)がそれらの周壁を貫通して設けられている一方、前記吸口部材(3)の内周面から2つの係合突起(9)(9)が相互に対向して内方に突出形成され、これらの係合突起(9)…がそれぞれ前記係合孔(8)(8)…に係合されている。これにより、吸口部材(3)とストロー本体(2)が軸線方向に係合するから、吸口部材(3)が筒状補強部材(4)に強固に一体化されると共に、これらがストロー本体(2)から離脱しないものとなる。従って、乳幼児等が取り扱う場合においても吸口部材(3)の誤飲を一層確実に防止し、安全性を十分に確保することができる。
【0022】
前記吸口部材(3)には、図2及び図3に示すようにストロー(1)の軸線方向に貫通する吸口孔(3a)が形成されており、これがストロー本体(2)の中空空間(2a)に連通状態となされて、飲料を吸い上げる流路が形成されているものである。本実施形態において吸口孔(3a)は、ストロー本体(2)の内径よりも径小に形成されている。このようにストロー本体(2)の上端部に、本体(2)の外径よりも径大の膨隆状頭部を形成する吸口部材(3)が一体的に被覆装着されているので、乳幼児等が口にくわえる場合であっても、吸口部材(3)を口中、例えば上下の歯や唇に係止させながらストロー(1)をくわえることができ、口から容易にストロー(1)が離脱することがなくて飲みやすいストロー(1)となる。しかも、吸口部材(3)の内径がストロー本体(2)の内径よりも径小に形成されているので、乳幼児等が勢いよく吸い込んでむせ返すようなことがなく、一層飲みやすいストロー(1)となる。
【0023】
また、ストロー本体(2)の上端部に筒状補強部材(4)及び吸口部材(3)が一体的に設けられているので、これまでのストロー(1)と異なった外観を有したものとなり、斬新な意匠が構成される。特に、本実施形態においてはストロー本体(2)上端部外周面に被覆装着された筒状補強部材(4)の上端部に、更に吸口部材(3)が一体成形されているので、吸口部材(3)と筒状補強部材(4)との材質、色等を異にすることができ、例えば両部材(3)(4)にそれぞれ異なる色を付することにより、一層美麗な意匠が構成される。
【0024】
更に、本実施形態においては、筒状補強部材(4)がインサート成形により形成され、外径が均一化された補強部材(4)の上端部外周面に吸口部材(3)がインサート成形により一体成形されているので、軸線方向の位置によって若干外径のばらつきがあるストロー本体(2)に直接吸口部材(3)が一体成形される場合に比べ、吸口部材(3)の仕上がりを良好なものとなしうる。即ち、成形用金型の不適合によるバリの発生を効果的に防止することができる。
【0025】
前記ストロー本体(2)を構成する合成樹脂としては、特に限定されないが、例えばEVA樹脂(エチレン−酢酸ビニル共重合体樹脂)、ポリプロピレン、ポリエチレン等が例示できる。また、吸口部材(3)、及び筒状補強部材(4)を構成する合成樹脂としても、特に限定されず、例えば酢酸ビニル樹脂、EVA樹脂、ポリプロピレン、ポリエチレン等が例示できる。ただ、インサート成形によりこれらの各部材(2)(3)(4)を一体成形するので、各部材(2)(3)(4)を構成する合成樹脂は、それぞれ相溶性のあるもので構成されるのが好ましい。各部材(2)(3)(4)の接合強度が向上し、各部材(2)(3)(4)の離脱が一層確実に防止されるからである。
【0026】
また、上記実施形態では、吸口部材(3)の形状は正面視ハート型形状となされているが、特にこのような形状に限定されるものではなく、例えば正面視チューリップ型形状であっても良いし、或いは正面視円形形状であっても良い。
【0027】
更に、上記実施形態では、ストロー本体(2)の形状は、真っ直ぐに延びる細長の円筒形状となされているが、特にこのような形状に限定されるものではなく、例えばその中間部で曲線状にループを形成した構成のものであっても良いし、その中間部に自由に伸縮する蛇腹機構が設けられて湾曲可能となされた構成のものであっても良い。
【0028】
また、上記実施形態では、係合孔(8)の数及び係合突起(9)の数は、それぞれ2個としているが、特にこれに限定されるものではなく、それぞれ1個であっても良いし、あるいは3個以上であっても良い。ただ、吸口部材のストロー本体からの離脱防止を確実に行う観点から、係合孔(8)の数及び係合突起(9)の数は、それぞれ2個以上とするのが望ましい。
【0029】
上記実施形態によるこの発明の吸飲用ストロー(1)は、例えば次のようにして製作することができる。即ち、まずストロー本体(2)の中空空間(2a)内に、該上端を貫通して、一部が外方に突出する態様でピン(10)を挿通配置せしめる。即ち、成型機の成形型の下方位置から上方に向けて配置されたピン(10)にストロー本体(2)をその上端を貫通してピン(10)の一部(先端)が外方に突出する態様でセッティングする。
【0030】
なお、ピン(10)の水平断面形状(先端部を除く)は、図5に示すように、その外周面の数箇所が内方に窪んだ形状となされており、これによりピン(10)外周面とストロー本体内周面との接触面積を少なくし、前記セッティングをスムーズに行い得るようになされている。また、ピン(10)の先端部は水平断面真円形状となされている。更に、ピン(10)の先端部の径はその中間部の径(外径)よりも径小に設定されている。
【0031】
次に、前記挿通配置状態で、前記ストロー本体(2)の上端部外周面に、該上端部所定長さ範囲を被覆補強する筒状補強部材(4)をインサート成形により一体成形する。このインサート時の成型用金型(20)内におけるストロー本体(2)及びピン(10)の配置態様を図6に示す。このような配置状態で、キャビティー(20a)側面に設けられた2つのピンゲート(21)(21)より樹脂をキャビティー(20a)内に射出すると、筒状補強部材(4)の一体成形が行われる。即ち、筒状補強部材(4)の成形と同時に該補強部材(4)のストロー本体(2)への被覆装着ができ、工程数を少なく抑えて吸飲用ストロー(1)の生産性を向上させることができる。
【0032】
次いで、前記筒状補強部材(4)及び前記ストロー本体(2)の上端部周壁に2つの相対向する係合孔(8)(8)をそれらの周壁を連通状態に貫通して設けた後、該補強部材(4)の上端部外周面及び前記ピン(10)の突出部外周面の周囲に、インサート成形法により膨隆状頭部を形成する吸口部材(3)を一体成形する。このインサート成型時の成型用金型(23)内におけるストロー本体(2)及びピン(10)の配置態様を図7(イ)、(ロ)に示す。このとき、ストロー本体(2)の上端を貫通して突出したピン(10)の先端部が、成型用金型(23)のキャビティー(23a)上面中心部に当接して配置される。このような配置状態で、キャビティー(23a)上面に設けられた2つのピンゲート(24)(24)より樹脂をキャビティー(23a)内に射出すると、前記筒状補強部材(4)及びストロー本体(2)の周壁を貫通して設けられた係合孔(8)…に樹脂が入り込んで突起(9)…が形成された状態で吸口部材(3)の一体成形が行われる。即ち、吸口部材(3)の内周面から内方に突出形成された係合突起(9)…が係合孔(8)…に係合された状態で一体成形することができる。
【0033】
次いで、成形用金型(23)内よりピン(10)を抜脱すると、吸口部材(3)の中にストロー(1)の軸線方向に貫通する吸口孔(3a)が形成され、この吸口孔(3a)がストロー本体(2)の中空空間(2a)と連通状態となるので、飲料を吸い上げる流路が形成される。そして、ピン(10)の先端部(10a)の径はその中間部の径(外径)よりも径小に設定されているので、得られる吸引用ストロー(1)において吸口部材(3)の内径はストロー本体(2)の内径よりも径小となる。従って、乳幼児等が勢い良く吸い込んでもむせ返すようなこともなく、非常に飲みやすいストロー(1)となる。
【0034】
上記製造方法によれば、インサート成形時に、吸口部材(3)の製作と、ストロー本体(2)、筒状補強部材(4)及び吸口部材(3)の一体化を同時に行うことができるので、工程数が少なくて済み、生産効率に優れている。また、簡単に各部材(2)(3)(4)の強固な一体化が図られる。
【0035】
図4には、この発明に係るストローの他の実施形態を示す。上記実施形態では、吸口部材(3)はインサート成形により一体成形された筒状補強部材(4)の上端部外周面に更にインサート成形により一体成形したものを示したが、この実施形態に係るストロー(31)は、吸口部材(33)を筒状補強部材(34)と同時に単一のインサート成形工程をもって成形したものである。この実施形態では、ストロー本体(2)の上端部周壁に係合孔(38)がその周壁を貫通して設けられる一方、吸口部材の内周面から係合突起(39)が内方に突出形成され、これらが係合されてストロー本体(2)に一体化されるものとなされている。このような構成にすれば、筒状補強部材(34)及び吸口部材部材(33)を同時に単一の成形工程で製作及び装着することができるので、生産効率の一層の向上を図ることができると共に、吸口部材(33)と筒状補強部材(34)とを一連のものとして形成することができ、両者の離脱を一層確実に防止しうるものとなしうる。このストロー(31)のその他の構成は、上記実施形態と同様であり、同一符号を付してその記載を省略する。
【0036】
【発明の効果】
以上のように、この発明に係る吸飲用ストローによれば、乳幼児等が口にくわえる場合であっても吸口部材を口中、例えば上下の歯や唇に係止させながらストローをくわえることができ、口から容易にストローが離脱することがなくて飲みやすいストローとなし得る。また、ストロー本体の上端部、特に吸口部材下端側近傍部分が補強され、噛み潰され難いものとなる。従って、乳幼児等がストロー本体の吸口部材下端側近傍部分を噛んだ場合でも、ストロー本体の断面形状の変形による接合面の剥離や、係止構造の解除等を防止することができ、筒状補強部材の吸口部材が離脱し難いものとなる。しかも、万一吸口部材がストロー本体から離脱した場合でも、吸口部材は筒状補強部材と共に離脱されることとなり、筒状補強部材はストロー本体の上端部所定長さ範囲を被覆する比較的大きなものとなされているので、乳幼児が誤って飲み込む心配もなく、安全性を十分に確保することができる。
【0037】
ストロー本体の上端部外周面に前記筒状補強部材が被覆装着され、該被覆装着された補強部材の上端部外周面を密着状態に覆った態様で吸口部材が一体成形されてなる場合には、吸口部材と筒状補強部材との材質、色等を異にすることができ、例えば両部材にそれぞれ異なる色を付することにより独特の意匠性に優れたストローを提供しうる。
【0038】
前記筒状補強部材及びストロー本体の上端部周壁に1ないし複数の係合孔がそれらの周壁を連通状態に貫通して設けられると共に、前記吸口部材の内周面から1ないし複数の係合突起が内方に突出形成され、該係合突起が前記係合孔に係合されてなる場合には、吸口部材、筒状補強部材及びストロー本体とが強固に一体化されるので、各部材の離脱がより一層確実に防止され、乳幼児等が誤飲する危険性を一層確実に回避することができる。
【0039】
前記筒状補強部は、その下端が下方に向かって内側に傾斜するテーパー状の挿入ガイドとして形成されてなる場合には、相対的に径小であるようなストロー差込口、例えば蓋付きコップのストロー差込口等に前記ガイドに導かれてスムーズに強制挿入することができる一方、該差込口に強制挿入されたストローは簡単に抜けることがなく、一層飲みやすいストローとなし得るという利点がある。
【0040】
また、この発明の製造方法によれば、筒状補強部材の製作と該部材のストロー本体への装着を同時にすることができ、吸飲用ストローの生産性を向上させることができる。また、吸口部材についても同様に製作と装着を同時に遂行することができ、生産性の向上が図られると共に、筒状補強部材の周壁だけでなく、ストロー本体の周壁にも樹脂が入り込んで突起が形成され、簡単に各部材の強固な一体化が図られる。しかも、吸口部材は、ストロー本体の中空空間内に、該本体の上端部を貫通して一部が外方に突出する態様でピンを挿通配置せしめた状態でインサート成形するので、一体成形後にピンを除去すると上端部材の中に軸線方向に貫通する中空空間が形成され、これがストロー本体の中空空間と連通状態となるので、格別の穿孔工程を要することなく、ストローの全長に亘り、しかも吸口部材内の口径を任意に設定した吸口孔を簡単に形成することができる。
【図面の簡単な説明】
【図1】この発明の一実施形態に係る吸飲用ストローを示す図であって、(イ)は正面図、(ロ)は側面図である。
【図2】(イ)は図1(ロ)におけるB−B線断面図である。(ロ)は図1(イ)におけるA−A線断面図である。
【図3】(イ)は図2(イ)の要部拡大断面図である。(ロ)は図2(ロ)の要部拡大断面図である。
【図4】(イ)は他の実施形態に係る吸飲用ストローの要部拡大断面図、(ロ)は(イ)におけるC−C線断面図である。
【図5】ストローの製作に際してストロー本体内にピンを挿入した状態の横断面図である。
【図6】筒状補強部材のインサート成型状態を示す断面図である。
【図7】(イ)は吸口部材のインサート成型状態を示す断面図、(ロ)は(イ)におけるD−D線断面図である。
【符号の説明】
1…吸飲用ストロー
2…ストロー本体
3…吸口部材
4…筒状補強部材
8…係合孔
9…係合突起
10…ピン[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a straw with a mouthpiece used for sucking beverages and a method for producing the same.
[0002]
[Prior art]
Conventionally, as a straw, a long straight pipe cut into a predetermined length, a bellows mechanism that freely expands and contracts at an intermediate portion thereof, and a curved one are generally used.
[0003]
By the way, when the infant tries to drink beverages using the conventional straw having the above configuration, for example, the infant does not have enough muscles around his mouth, so the thin straight tubular straw can be stabilized. For this reason, even if it is added once, it often comes out of the mouth easily, and if a straw comes out of the mouth while drinking, the drink may spill out of the mouth.
[0004]
In addition, since the cut surface is exposed at the end of the straw, an infant who is not accustomed to handling the straw may accidentally poke into the mouth at the end of the straw. In particular, there is a risk of injury if the person falls while walking or running while holding a straw in his mouth.
[0005]
Therefore, in the prior proposal, a mouthpiece member having a rounded diameter larger than the outer diameter of the main body of the straw main body is integrally provided by bonding, fusing, or forced fitting. Has been proposed.
[0006]
According to this prior proposal, since a suction member having a diameter larger than the outer diameter of the main body is formed at the upper end portion of the straw body, by adding the straw while the suction member is locked in the mouth, It is difficult to pull out from the mouth, that is, it is difficult to detach, and the suction member is rounded, so it is possible to prevent the situation that the top end of the straw pokes inside the mouth, ensuring safety. It is advantageous in that it can be done.
[0007]
[Problems to be solved by the invention]
However, in the straw according to the above configuration, there is a concern that the suction member is detached from the straw body. That is, an infant or the like may grab the suction member at one end of the straw and bite the upper end portion of the straw body, particularly the vicinity of the lower end side of the suction member, and plastically deform the cross-sectional shape of the portion. This may cause peeling or release of the locking structure on the joint surface of the suction member, which may cause the suction member to be unintentionally detached from the straw body. In addition, when the suction member is detached from the straw, there is a concern that an infant or the like may accidentally swallow it due to its size.
[0008]
In addition, if the straw body and the suction member are manufactured separately and then integrated with each other, the manufacturing process for each member and the process for integrating these components are required, producing a large number of processes. There was also a problem of inferiority.
[0009]
The present invention has been made in view of such a technical background, and even when used by infants and the like, it is easy to suck a beverage, and the mouthpiece member provided at the upper end of the straw is detached from the straw. It is an object of the present invention to provide a drinking straw and a method for manufacturing the drinking straw that can sufficiently secure safety without swallowing the mouthpiece member even if it is detached.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a drinking straw according to the present invention has a mouthpiece member that forms a bulged head integrally covered and attached to an upper end portion of a straw body made of a tubular body. A cylindrical reinforcing member that is hung downward from the lower end of the straw body and covers and reinforces the predetermined length range of the upper end portion of the straw body in a close contact state is integrally provided.
[0011]
According to this, since the mouthpiece member that forms the bulged head is integrally covered and attached to the upper end portion of the straw body, the mouthpiece member can be placed in the mouth, for example, in the upper and lower sides, even when an infant or the like is added to the mouth. The straw can be added while being locked to the teeth or lips, and the straw can be easily taken without being easily removed from the mouth. In addition, since the cylindrical reinforcing member that hangs downward from the lower end of the suction member and covers and reinforces the predetermined length range of the upper end portion of the straw body is integrally provided, the upper end portion of the straw body, particularly the suction member The vicinity of the lower end side is reinforced and becomes difficult to be crushed. Thus, even when an infant or the like bites the vicinity of the lower end side of the mouthpiece member of the straw body, the mouthpiece member is hardly detached. Moreover, even if the suction member is detached from the straw body, the suction member is detached together with the cylindrical reinforcing member, and the cylindrical reinforcing member is a relatively large one that covers a predetermined length range of the upper end portion of the straw body. Therefore, it is possible to ensure sufficient safety without worrying that an infant will accidentally swallow it.
[0012]
When the cylindrical reinforcing member is covered and attached to the outer peripheral surface of the upper end portion of the straw body, and the suction member is integrally molded in a state of covering the outer peripheral surface of the upper end portion of the reinforcing member attached and covered in a close contact state, The suction member and the cylindrical reinforcing member can be made of different materials, colors, and the like. For example, by giving different colors to the two members, a straw having a unique design can be provided.
[0013]
One or more engagement holes are provided in the upper peripheral wall of the cylindrical reinforcing member and the straw body so as to penetrate the peripheral wall, and one or more engagement protrusions are formed inward from the inner peripheral surface of the suction member. When the engaging protrusion is engaged with the engaging hole, the suction member, the cylindrical reinforcing member, and the straw body are firmly integrated with each other. The risk of accidental ingestion by infants and the like can be more reliably avoided, more reliably prevented.
[0014]
The cylindrical reinforcing member is preferably formed in a tapered insertion guide whose lower end is inclined inwardly downward. With such a configuration, it is possible to smoothly and forcefully insert into a straw insertion port having a relatively small diameter, for example, a straw insertion port of a lidded cup, while forcibly inserting into the insertion port. The straws that have been made do not come off easily, and can be made to be easier to drink.
[0015]
On the other hand, a preferred method for producing a drinking straw according to the present invention includes a step of inserting and arranging a pin in a hollow space of the straw body so as to penetrate the upper end of the straw body and partly protrude outward. A step of integrally forming a cylindrical reinforcing member for covering and reinforcing the upper end portion predetermined length range in close contact with the outer peripheral surface of the upper end portion of the straw body by insert molding; and the upper end portions of the cylindrical reinforcing member and the straw body A step of providing one or a plurality of engagement holes in the peripheral wall through the peripheral walls, and a method of covering the outer peripheral surface of the upper end portion of the reinforcing member and the outer peripheral surface of the upper protruding portion of the pin, Including a step of integrally molding the suction member forming the portion, and a step of removing the pin after the step.
[0016]
According to this, since the cylindrical reinforcing member for covering and reinforcing the upper end predetermined length range in a close contact state is integrally formed on the outer peripheral surface of the upper end portion of the straw body, the manufacturing of the cylindrical reinforcing member and the straw of the member are performed. It can be attached to the main body at the same time, and the productivity of the drinking straw can be improved. In addition, one or a plurality of engaging holes are provided in the upper end peripheral wall of the cylindrical reinforcing member and the straw body so as to penetrate the peripheral wall, and then the outer peripheral surface of the upper end of the reinforcing member and the outer periphery of the upper protruding portion of the pin Since the mouthpiece member that forms the bulged head by insert molding is integrally molded in a manner covering the surface, the mouthpiece member can be manufactured and mounted at the same time as described above, and productivity can be improved. The resin enters not only the peripheral wall of the cylindrical reinforcing member but also the peripheral wall of the straw body to form protrusions, so that the members can be easily firmly integrated. Moreover, since the suction member is insert-molded in a state where the pin is inserted and arranged in the hollow space of the straw body so that a part protrudes outwardly through the upper end portion of the body, the pin is formed after integral molding. Is removed, a hollow space penetrating in the axial direction is formed, and this is in communication with the hollow space of the straw body, so that the diameter of the suction member can be arbitrarily set over the entire length of the straw without requiring a special drilling step. It is possible to easily form the suction hole set to.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a drinking straw according to the present invention will be described based on an embodiment shown in the drawings.
[0018]
As shown in FIGS. 1 to 3, the drinking straw (1) has a bulging shape made of a synthetic resin at the upper end of a straw body (2) made of an elongated tubular body made of a synthetic resin having openings at both ends. A colored suction member (3) having a heart shape in front view forming a head is integrally attached to the top, and the upper end of the straw body (2) is suspended from the lower end of the suction member (3). A cylindrical reinforcing member (4) for covering and reinforcing a predetermined length range in a close contact state is integrally provided. That is, as shown in FIGS. 2 and 3, the drinking straw (1) is covered with the cylindrical reinforcing member (4) so as to be in close contact with the outer peripheral surface of the upper end portion of the straw body (2) by insert molding. The suction member (3) is integrally formed by insert molding in a manner covering the outer peripheral surface of the upper end portion of the reinforcing member (4) fitted with the covering. In the present embodiment, the straw body (2) is formed by cutting a synthetic resin-made circular tubular body continuously formed by extrusion molding into a predetermined length.
[0019]
As described above, since the portion near the lower end side of the suction member (3) of the straw body (2) is covered and reinforced by the tubular reinforcing member (4), the peripheral wall of the straw body (2) on the lower end side of the suction member (3) is reinforced. Therefore, even when an infant or the like bites the straw (1), the suction member (3) is difficult to be released. Moreover, even if the suction member (3) is detached from the straw body (2), it is separated together with the integrated tubular reinforcing member (4), and the tubular reinforcing member (4) is separated from the straw body. Since it is made comparatively big so that the upper end predetermined length range of (2) may be covered, there is no fear that an infant will accidentally swallow it, and safety can be sufficiently secured. The length of the tubular reinforcing member (4) is set in the range of 25 mm to 60 mm from the upper end edge of the straw body (2). If the length of the tubular reinforcing member (4) is smaller than 25 mm, an infant or the like may be used when the suction member (3) integrated with the reinforcing member (4) is detached from the straw body (2). On the other hand, when it is larger than 60 mm, it is not preferable because the manufacturing cost is increased and the design property is also lowered. More preferably, it is good to set the length of a cylindrical reinforcement member (4) in the range of 35 mm-50 mm.
[0020]
The cylindrical reinforcing member (4) is formed as a tapered insertion guide portion (4a) whose lower end is inclined inwardly downward. Thereby, while being able to insert smoothly into a straw insertion port, for example, a straw insertion port with a relatively small diameter of a lidded cup, the straw (1) forcedly inserted into the insertion port is simple. It can be assumed that it will not fall out.
[0021]
Further, as shown in FIGS. 3 (a) and 3 (b), the cylindrical reinforcing member (4) has an annular detachment preventing protrusion (6) on the outer peripheral surface of the upper end in the axial direction of the straw (1). While being formed in a zigzag cross section, an annular engagement groove (7) is formed on the inner peripheral surface of the suction member (3) so as to face these protrusions (6), and these are engaged. Two engaging holes (8), (8), (8) facing the cylindrical reinforcing member (4) located below the projecting portion (6) and the peripheral wall of the upper end of the straw body (2). While (8) is provided through the peripheral walls, two engaging projections (9) and (9) are formed to project inward from the inner peripheral surface of the suction member (3). These engagement protrusions (9) are engaged with the engagement holes (8), (8), respectively. As a result, the suction member (3) and the straw body (2) are engaged in the axial direction, so that the suction member (3) is firmly integrated with the cylindrical reinforcing member (4), and these are connected to the straw body ( It will not leave from 2). Therefore, even when an infant or the like handles it, it is possible to more reliably prevent accidental ingestion of the mouthpiece member (3) and sufficiently ensure safety.
[0022]
The suction member (3) is formed with a suction hole (3a) penetrating in the axial direction of the straw (1) as shown in FIGS. 2 and 3, and this is a hollow space (2a) of the straw body (2). ), And a flow path for sucking up the beverage is formed. In this embodiment, the suction hole (3a) is formed smaller in diameter than the inner diameter of the straw body (2). Thus, the mouthpiece member (3) that forms a bulged head having a diameter larger than the outer diameter of the main body (2) is integrally attached to the upper end portion of the straw main body (2). Even when the mouth is held in the mouth, the straw (1) can be held while the mouthpiece member (3) is locked in the mouth, for example, the upper and lower teeth or lips, and the straw (1) can be easily detached from the mouth. It becomes a straw (1) that is easy to drink without anything. In addition, since the inner diameter of the suction member (3) is smaller than the inner diameter of the straw body (2), the straw (1) is easier to swallow without causing an infant or the like to suck it in and out. It becomes.
[0023]
Moreover, since the cylindrical reinforcement member (4) and the suction member (3) are integrally provided at the upper end portion of the straw body (2), the straw body (2) has an appearance different from that of the previous straw (1). A novel design is constructed. In particular, in the present embodiment, since the suction member (3) is further integrally formed with the upper end portion of the cylindrical reinforcing member (4) attached to the outer peripheral surface of the upper end portion of the straw body (2), the suction member ( 3) and the cylindrical reinforcing member (4) can be made of different materials, colors, etc. For example, by adding different colors to the members (3) and (4), a more beautiful design can be constructed. The
[0024]
Furthermore, in this embodiment, the cylindrical reinforcing member (4) is formed by insert molding, and the suction member (3) is integrated with the outer peripheral surface of the upper end portion of the reinforcing member (4) having a uniform outer diameter by insert molding. Since it is formed, the finish of the suction member (3) is better than when the suction member (3) is directly formed integrally with the straw body (2), which has a slight variation in outer diameter depending on the position in the axial direction. It can be done. That is, it is possible to effectively prevent the generation of burrs due to incompatibility of the molding die.
[0025]
Although it does not specifically limit as synthetic resin which comprises the said straw main body (2), For example, EVA resin (ethylene-vinyl acetate copolymer resin), a polypropylene, polyethylene etc. can be illustrated. Moreover, it does not specifically limit as a synthetic resin which comprises a suction member (3) and a cylindrical reinforcement member (4), For example, a vinyl acetate resin, EVA resin, a polypropylene, polyethylene etc. can be illustrated. However, since these members (2), (3), and (4) are integrally formed by insert molding, the synthetic resins constituting the members (2), (3), and (4) are each composed of compatible materials. Preferably it is done. This is because the bonding strength of the members (2), (3), and (4) is improved, and the detachment of the members (2), (3), and (4) is more reliably prevented.
[0026]
Moreover, in the said embodiment, although the shape of a suction member (3) is made into the heart shape of a front view, it is not specifically limited to such a shape, For example, a tulip shape of a front view may be sufficient. Alternatively, it may have a circular shape when viewed from the front.
[0027]
Furthermore, in the said embodiment, although the shape of the straw main body (2) is made into the elongate cylindrical shape extended straightly, it is not specifically limited to such a shape, For example, it is curvilinear at the intermediate part. It may have a configuration in which a loop is formed, or may have a configuration in which a bellows mechanism that freely expands and contracts is provided at an intermediate portion thereof so that it can be bent.
[0028]
Moreover, in the said embodiment, although the number of the engagement holes (8) and the number of the engagement protrusions (9) are each two, it is not limited to this in particular, Even if each is one It may be good, or three or more. However, it is desirable that the number of the engagement holes (8) and the number of the engagement protrusions (9) be two or more from the viewpoint of reliably preventing the suction member from being detached from the straw body.
[0029]
The drinking straw (1) of this invention by the said embodiment can be manufactured as follows, for example. That is, first, the pin (10) is inserted and arranged in the hollow space (2a) of the straw body (2) so as to penetrate the upper end and partially protrude outward. That is, a pin (10) arranged upward from the lower position of the molding die of the molding machine passes through the upper end of the straw body (2) and a part (tip) of the pin (10) protrudes outward. Set in the manner to do.
[0030]
In addition, as shown in FIG. 5, the horizontal sectional shape of the pin (10) (excluding the tip portion) has a shape in which several portions on the outer peripheral surface are recessed inwardly, whereby the outer periphery of the pin (10) The contact area between the surface and the inner peripheral surface of the straw body is reduced so that the setting can be performed smoothly. Moreover, the front-end | tip part of the pin (10) is made into the horizontal cross-section perfect circle shape. Furthermore, the diameter of the tip of the pin (10) is set smaller than the diameter (outer diameter) of the intermediate part.
[0031]
Next, in the insertion arrangement state, a cylindrical reinforcing member (4) for covering and reinforcing the upper end portion predetermined length range is integrally formed on the outer peripheral surface of the upper end portion of the straw body (2) by insert molding. The arrangement | positioning aspect of the straw main body (2) and the pin (10) in the metal mold | die (20) at the time of this insertion is shown in FIG. In such an arrangement, when the resin is injected into the cavity (20a) from the two pin gates (21) (21) provided on the side surface of the cavity (20a), the cylindrical reinforcing member (4) is integrally formed. Done. That is, the reinforcing member (4) can be coated on the straw body (2) simultaneously with the formation of the cylindrical reinforcing member (4), and the productivity of the drinking straw (1) can be improved by reducing the number of steps. be able to.
[0032]
Next, after providing two opposing engaging holes (8) and (8) through the peripheral walls in a communicating state on the peripheral walls of the cylindrical reinforcing member (4) and the straw body (2). A mouthpiece member (3) that forms a bulged head is integrally formed by an insert molding method around the outer peripheral surface of the upper end portion of the reinforcing member (4) and the outer peripheral surface of the protruding portion of the pin (10). FIGS. 7A and 7B show the arrangement of the straw body (2) and the pin (10) in the molding die (23) during the insert molding. At this time, the tip of the pin (10) protruding through the upper end of the straw body (2) is disposed in contact with the center of the upper surface of the cavity (23a) of the molding die (23). In such an arrangement, when the resin is injected into the cavity (23a) from the two pin gates (24) (24) provided on the upper surface of the cavity (23a), the cylindrical reinforcing member (4) and the straw body The suction member (3) is integrally formed in a state where the resin enters the engagement holes (8) provided through the peripheral wall of (2) to form the projections (9). That is, it is possible to integrally mold the engaging projections (9) formed so as to project inward from the inner peripheral surface of the suction member (3) in a state of being engaged with the engaging holes (8).
[0033]
Next, when the pin (10) is removed from the molding die (23), a suction hole (3a) penetrating in the axial direction of the straw (1) is formed in the suction member (3). Since (3a) is in communication with the hollow space (2a) of the straw body (2), a flow path for sucking up the beverage is formed. And since the diameter of the front-end | tip part (10a) of a pin (10) is set smaller than the diameter (outer diameter) of the intermediate part, in suction straw (1) obtained, a suction member (3) The inner diameter is smaller than the inner diameter of the straw body (2). Therefore, the straw (1) is very easy to drink without causing an infant or the like to breathe in vigorously.
[0034]
According to the above manufacturing method, at the time of insert molding, the production of the suction member (3) and the integration of the straw body (2), the cylindrical reinforcing member (4) and the suction member (3) can be performed simultaneously. The number of processes is small and production efficiency is excellent. In addition, the members (2), (3), and (4) can be easily firmly integrated.
[0035]
FIG. 4 shows another embodiment of the straw according to the present invention. In the said embodiment, although the suction member (3) showed what was further integrally molded by insert molding in the outer peripheral surface of the upper end part of the cylindrical reinforcement member (4) integrally molded by insert molding, the straw which concerns on this embodiment was shown. (31) is formed by molding the suction member (33) simultaneously with the cylindrical reinforcing member (34) through a single insert molding step. In this embodiment, the engagement hole (38) is provided in the upper end peripheral wall of the straw body (2) so as to penetrate the peripheral wall, while the engagement protrusion (39) protrudes inward from the inner peripheral surface of the suction member. These are formed, and these are engaged and integrated with the straw body (2). With such a configuration, the cylindrical reinforcing member (34) and the suction member member (33) can be manufactured and mounted at the same time in a single molding process, so that the production efficiency can be further improved. At the same time, the suction member (33) and the cylindrical reinforcing member (34) can be formed as a series, and the separation of both can be prevented more reliably. The other structure of this straw (31) is the same as that of the said embodiment, attaches | subjects the same code | symbol and abbreviate | omits the description.
[0036]
【The invention's effect】
As described above, according to the drinking straw according to the present invention, even when an infant or the like is added to the mouth, the sucking member can be added to the mouth, for example, the upper and lower teeth or the lips, and the straw can be added. A straw that does not easily come off from the mouth and can be easily taken can be obtained. Further, the upper end portion of the straw body, in particular, the vicinity of the lower end side of the suction member is reinforced, and it is difficult to be bitten. Accordingly, even when an infant or the like bites the portion near the lower end side of the mouthpiece of the straw body, it is possible to prevent peeling of the joint surface due to deformation of the cross-sectional shape of the straw body, release of the locking structure, etc. The suction member of the member is difficult to be detached. Moreover, even if the suction member is detached from the straw body, the suction member is detached together with the cylindrical reinforcing member, and the cylindrical reinforcing member is a relatively large one that covers a predetermined length range of the upper end portion of the straw body. Therefore, it is possible to ensure sufficient safety without worrying that an infant will accidentally swallow it.
[0037]
When the cylindrical reinforcing member is covered and attached to the outer peripheral surface of the upper end portion of the straw body, and the suction member is integrally molded in a state of covering the outer peripheral surface of the upper end portion of the reinforcing member attached and covered in a close contact state, The suction member and the cylindrical reinforcing member can be made of different materials, colors, and the like. For example, by giving different colors to the two members, a straw having a unique design can be provided.
[0038]
One or more engaging holes are provided in the upper end peripheral wall of the cylindrical reinforcing member and the straw body so as to penetrate the peripheral wall in a communicating state, and one or more engaging protrusions from the inner peripheral surface of the suction member. Is formed inwardly and the engaging projection is engaged with the engaging hole, the suction member, the cylindrical reinforcing member and the straw body are firmly integrated with each other. Withdrawing can be prevented more reliably, and the risk of accidental ingestion by infants and the like can be more reliably avoided.
[0039]
When the cylindrical reinforcing portion is formed as a tapered insertion guide whose lower end is inclined inwardly downward, a straw insertion port having a relatively small diameter, for example, a lidded cup The straw can be smoothly inserted by being guided by the guide into the straw insertion port, etc., while the straw forcedly inserted into the insertion port is not easily pulled out, and can be made easier to drink. There is.
[0040]
Moreover, according to the manufacturing method of this invention, manufacture of a cylindrical reinforcement member and attachment to the straw main body of this member can be performed simultaneously, and the productivity of the drinking straw can be improved. In addition, the suction member can be manufactured and mounted at the same time, improving productivity, and the resin enters not only the peripheral wall of the cylindrical reinforcing member but also the peripheral wall of the straw main body. Thus, each member can be easily firmly integrated. Moreover, since the suction member is insert-molded in a state where the pin is inserted and arranged in the hollow space of the straw body so that a part protrudes outwardly through the upper end portion of the body, the pin is formed after integral molding. Is removed, a hollow space penetrating in the axial direction is formed in the upper end member, and this is in communication with the hollow space of the straw body. Therefore, the suction member extends over the entire length of the straw without requiring a special drilling step. A suction hole in which the inner diameter is arbitrarily set can be easily formed.
[Brief description of the drawings]
FIG. 1 is a view showing a drinking straw according to an embodiment of the present invention, in which (A) is a front view and (B) is a side view.
2A is a cross-sectional view taken along line BB in FIG. 1B. FIG. (B) is a cross-sectional view taken along line AA in FIG.
3 (a) is an enlarged cross-sectional view of a main part of FIG. 2 (a). (B) is an enlarged cross-sectional view of the main part of FIG. 2 (B).
4A is an enlarged cross-sectional view of a main part of a drinking straw according to another embodiment, and FIG. 4B is a cross-sectional view taken along line CC in FIG.
FIG. 5 is a cross-sectional view showing a state in which a pin is inserted into the straw body when the straw is manufactured.
FIG. 6 is a cross-sectional view showing an insert-molded state of a cylindrical reinforcing member.
7A is a cross-sectional view showing an insert molding state of the suction member, and FIG. 7B is a cross-sectional view taken along the line DD in FIG.
[Explanation of symbols]
DESCRIPTION OF
Claims (4)
該吸口部材の下端から垂下されて前記ストロー本体の上端部所定長さ範囲を密着状態に被覆補強する筒状補強部材が一体的に設けられてなり、
前記ストロー本体の上端部外周面に前記筒状補強部材が被覆装着され、該被覆装着された補強部材の上端部外周面を密着状態に覆った態様で吸口部材が一体成形されてなることを特徴とする吸飲用ストロー。A suction member that forms a bulged head is integrally covered and mounted on the upper end of the straw body made of a tubular body,
Ri tubular reinforcing member covering reinforce the upper portion a predetermined length range of the straw body is suspended from the lower end of the suction port member in close contact with the name provided integrally,
It said tubular reinforcing member is coated mounted on the upper end portion outer peripheral surface of the straw body, mouthpiece in the coating loaded manner the upper end portion outer peripheral surfaces covered in close contact of the reinforcing member to Rukoto such is integrally molded Characteristic drinking straw.
前記吸口部材の内周面から1ないし複数の係合突起が内方に突出形成され、
該係合突起が前記係合孔に係合されてなる請求項1に記載の吸飲用ストロー。One or a plurality of engagement holes are provided through the peripheral wall of the cylindrical reinforcing member and the upper end peripheral wall of the straw body,
One or more engaging protrusions are formed to protrude inward from the inner peripheral surface of the suction member,
The drinking straw according to claim 1 , wherein the engaging protrusion is engaged with the engaging hole.
前記ストロー本体の上端部外周面に、該上端部所定長さ範囲を密着状態に被覆補強する筒状補強部材をインサート成形により一体成形する工程と、
該筒状補強部材及びストロー本体の上端部周壁に1ないし複数の係合孔をそれらの周壁を貫通して設ける工程と、
該補強部材の上端部外周面及び前記ピンの上方突出部外周面を被覆する態様で、インサート成形により膨隆状頭部を形成する吸口部材を一体成形する工程と、
該工程後にピンを抜脱する工程と、を包含することを特徴とする吸飲用ストローの製造方法。In the hollow space of the straw body, through the upper end of the straw body, a step of inserting and arranging the pins in a manner that a part protrudes outward;
A step of integrally forming a cylindrical reinforcing member that covers and reinforces the upper end portion predetermined length range in close contact with the outer peripheral surface of the upper end portion of the straw body by insert molding;
A step of providing one or more engaging holes penetrating through the peripheral walls of the cylindrical reinforcing member and the upper peripheral wall of the straw body;
A step of integrally molding a mouthpiece member that forms a bulged head by insert molding in a manner covering the outer peripheral surface of the upper end portion of the reinforcing member and the outer peripheral surface of the upper projecting portion of the pin;
And a step of removing the pin after the step.
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